Add build and test flag for Javascript on MacOS to kokoro/testutils/run_bazel_tests.sh
Add build and test flag for Javascript on MacOS to kokoro/testutils/run_bazel_tests.sh

PiperOrigin-RevId: 468663601

google/tink,google/tink,google/tink,google/tink,google/tink,google/tink,google/tink,google/tink